The Chevy and GMC 3/4 Ton and 1 Ton Trucks with the Turbo 400 2wd used a bolt on Yoke.
The Main output shaft is just a hair shorter than the Passenger Musclecar Turbo 400 Short output shaft used 1965-1974 in Chevy, Pontiac, Oldsmobile, and Buick.
Turbo 400 passenger car application last used in the 1976 Corvette, 1976 Pontiac Grand Prix 400 & 455 engines & 1977 Buick Electra 225 with the Olds 403 V8 with Turbo 400 Transmission.
Remove the Chevy bolt on yoke to the Turbo 400. It will work in all standard short shaft Turbo 400 applications.
The Factory Mechanics 3R Turbo 400 slip yokes are very hard to find today.
Quite strong will take up to 700 Hp max.
550-600 Hp True is a good idea to upgrade to 1 size larger U-joints 1350 Dana Spicer.
Going to spend money to upgrade Right for 1000-2000 Hp 1350 Billet 4140 Chromemoly Slip Yoke, Rear Differential companion flange 4140, Might as well get the best Chromemoly 4130 Driveshaft made it's by Mark Williams Racing.
Going to spend $1200-1500 cash.
The 1971-1974 Firebird Trans Am Had the shortest and Strongest Turbo 400 3R Mechanics Driveshaft slip Yoke what I use on my 1963 Pontiac Gp.
From a 1973 Trans Am 455 Turbo 400 car.